Owner Dave Lowe paid tribute to Kachy after his all-weather star suffered a fatal injury at Lingfield.
Tom Dascombe's speedster was lining up in Saturday's Heed Your Hunch At Betway Handicap after his planned appearance in the Listed Cleves Stakes two weeks ago was scuppered by a last-minute setback.
Connections faced a race against time to qualify him to defend his crown in the sprint division on All-Weather Finals Day on Good Friday, with options running out.
They chose to run in a handicap rather than a fast-track qualifier in France - but after Kachy broke in his usual electric style, he took a false step as the race began in earnest and was swiftly pulled up by Richard Kingscote.
It was later announced the Kyllachy horse had been put down.
RIP Big fella.
— Dave Lowe (@jdavelowe) February 15, 2020
You were our world and will be missed forever. 🏇💚🖤😢 #KingKachy
Kachy won nine of his 28 lifetime starts.
As well as winning four times at Lingfield, including on 2019 Finals Day, he claimed the Group Three Molecombe at Goodwood as a juvenile and was twice placed in Group One company at Royal Ascot - finishing second in the 2016 Commonwealth Cup and third in last year's Diamond Jubilee Stakes.
Today's race was won by James Fanshawe's Harry's Bar (5-1).
